1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone

Also known as: 3-acetyl-7H-pyrazolo[1,5-b]pyridazin-6-one, 3-acetyl-Pyrazolo[1,5-b]pyridazin-6(7H)-one, Pyrazolo[1,5-b]pyridazin-6(7H)-one, 3-acetyl-

1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone (CAS 551920-26-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H7N3O2 and a molecular weight of 177.16000 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 551920-26-4
Jingsj CID: J-1065026-7
Molecular Formula: C₈H₇N₃O₂
Molecular Weight: 177.16000 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Exact Mass	177.05400
PSA	67.49000
LogP	0.63750

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone?

The CAS number of 1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone is 551920-26-4.

What are the molecular formula and molecular weight of 1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone?

1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone has molecular formula C8H7N3O2 and molecular weight 177.16000 g/mol.

What are the upstream and downstream products of 1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone?

For 1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone, Upstream Products: 1-(6-methoxypyrazolo[1,5-b]pyridazin-3-yl)ethanone, 3(2H)-Pyridazinone, 3-Butyn-2-one.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-(6-Hydroxypyrazolo[1,5-b]pyridazin-3-yl)ethanone (CAS 551920-26-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1065026-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.